Striking-surface on safety-match boxes, &amp;c.



UNITED sr'itrnsri truur OF ICE.

ADOLF SWC-BODA, 0F VIENNA, AUSTRIA-HUNGARY, LSSIGNOR 0S GFE-BALF TO THE FIRM OF ENZESFELDEB M'UNITIONS- UND METALLWERKE ANTON KELLER AKT.

CES, 0F VIENNA, AUSTRIA-HUNGARY.

STBIKHFG-SUEFACE 0N SAFETY-MATCH BOXES, Gzc.

F0 Drawiii g.

.he on.' ignited on a special surface, have been formed by applying the friction substance to the paper that was put around the box. The disadvantage of this method was that when the striking surface became damp the paper layer became spon 'y and wrinkled and could be easily detached roni the wooden surface, so that when a match was struck it'was torn off. Moreover the friction surface which had become damp did not easily dry, as the moisture penetrated the layer beneath or was absorbed thercl;

According to the present invention a coat ing substance is produced, whi h resists moisture and notwithstanding moisture is not destroyed wh n itriil. This result is effected by the employment of a bed or ground of gypsum, cement or similar bodies capable of binding. to which the usual substance on which the match is. struck and which causes the ignition is applied. This bed or ground forms a firm underlayer which cannot be atlected by dampness and therefore prevents Lie igniting coating be ing torn oil when the match is struck. It

thus insures economy in the coating substance. 40

The method is carried out in the following manner. parts of glue size. are dissolved in 250 parts of luke "M121 water; 60 parts of Portland cement, 60 parts of gypsum, 60 parts of pipe clay, 5 arts of cork meal and 10 parts of iron-minium in the form of fine dry powder are then thoroughly mixed. This mixture is introduced into the glue size solution and stirred therein by means of stirring dislgs, the solution being kept in a lukewarm state, in order that the size may remain fluid. The substance so -Spectflcation of Letters Patent Patented Feb. 22, 1916. Application tiled January 20, 1809. Serial No. 475,100.

obtained is well ground in a. wet mill and sub equently applied in the cold state to the bare wooden surface of the box in the known manner and finally dried until the coating material for igniting the matches can be applied to the bed or ground substance. As a covering for this bed or ground material a mixture consisting of 100 parts of water,

18 parts of niucilage consisting of a solution of 33 parts gum in 67 parts water, 26 parts of amorphous phosphorus. '1 part of finely powdered cork, 10 parts ot= rye meal and 10 parts of iron miniuni will be found very effective, this mixture being stirred in a cold state, and ground and worked also in a cold state. Itis applied to the bed or ground material in the known manner. Any

other material employed hitherto for the purpose may however be applied to my new composition constituting the bed or ground substance.

Havin thus described my invention, what,

I claim is:---

l. The herein described composition of matter for constituting a ground substance for the ignition surfaces of safety match boxes, comprising glue size. cement, ypsum, pipe clay, cork meal, and iron miniuin. substantially as described.

'2. The herein des ribed composition of. matter constituting a ground substance I0!' the ignition surfaces of safety match-boxes, consisting of approximately equal parts glue size. cement, ypsuin, and pipe clay, and relatively smaller parts of cork meal and iron miniuni. mixed with water. substans tially as described.

3. The herein described composition of matter for constituting a ground substance fointhe ignition surfaces of safetyvinatch boxes. consisting of, by weight. (30 parts glue size, 60 parts powdered cement, 60 parts gypsum, 60 parts pipe clay. 5 parts cork meal,'10 parts iron niiniuin, and 250 parts water. substantially as described.

In testimony whereof I attix my signature in presence of two witnesses.

ADOLF S\VOBODA. Witnesses i ROBERT W. HnmoARTNsR, Joiuzz KscnrcmcAoHLY. 

